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Van Hout MC. 
“An Internet Study of User's Experiences of the Synthetic Cathinone 4-Methylethcathinone (4-MEC)”. 
J Psychoactive Drugs. 2014 Oct-Dec 05;46(4):273-86.
A synthetic cathinone called 4-methylethcathinone (4-MEC) emerged online in 2010, and was cyber-marketed to be a replacement for mephedrone. The study aimed to present user experiences of 4-MEC as reported on the Internet, with a focus on user profiles, sourcing and product characteristics, routes of administration, dosage, positive and undesirable effects, and comparisons to mephedrone. Twenty-three individual, anonymous trip reports of the sole use of 4-MEC, and 112 screenshots of general 4-MEC user discussion boards, were taken from a purposeful sample of public drug-related sites. A content textual analysis was conducted on extracted qualitative information and produced 41 categories compiled into five general themes: Type of 4-MEC user; Sourcing, informed decision making, product characteristics, and quality assurance; Routes of administration, gauging of dosage, and consumption of other drugs; Time course effects and outcomes; and Comparisons with mephedrone. 4-MEC is sold as white beads, crystalline shards, or green balls. User motives centered on curiosity, pricing, and ease of web sourcing. Oral, nasal, injecting, eyeball, and rectal routes of administration were described. Testing for purity, allergy testing, and gauging of dosage were common. Users described euphoric but short-lived effects, with little comedown. Continued research is vital to inform harm reduction.

Key Words: 4-MEC; 4-methylethcathinone; Internet discussion forum; cathinone; mephedrone; novel psychoactive substance
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